Trouble using CRS from ESRI ArcGIS 9.3 (esri:102003)
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Trouble using CRS from ESRI ArcGIS 9.3 (esri:102003)
by Benjamin Wright
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I'm having trouble using a CRS I'm getting from an ESRI ArcGIS 9.3 server. (MapServer Service)
The error I get is: Caused by: org.opengis.referencing.operation.OperationNotFoundException: Bursa wolf parameters required. at org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:1072) at org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:1136) at org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:881) at org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:998) at org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperation(DefaultCoordinateOperationFactory.java:267) at org.geotools.referencing.operation.BufferedCoordinateOperationFactory.createOperation(BufferedCoordinateOperationFactory.java:254) at org.geotools.referencing.CRS.findMathTransform(CRS.java:1001) at org.geotools.referencing.CRS.findMathTransform(CRS.java:969) The call made into this is: CRS.findMathTransform(CRS_IN_QUESTION,DefaultGeographicCRS.WGS84); I get the CRS from the WKT: PROJCS["USA_Contiguous_Albers_Equal_Area_Conic",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-96.0],PARAMETER["Standard_Parallel_1",29.5],PARAMETER["Standard_Parallel_2",45.5],PARAMETER["Latitude_Of_Origin",37.5],UNIT["Meter",1.0],AUTHORITY["ESRI","102003"]] Spatial Reference: http://spatialreference.org/ref/esri/102003/ I'm using Geotools version 2.5.2 What are 'Bursa wolf parameters'? Do I need them? Any ideas? Should this be fixed if I upgrade to 2.6? (working across a few companies - upgrading isn't as easy as it would sound but it is possible) |
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Re: Trouble using CRS from ESRI ArcGIS 9.3 (esri:102003)
by Andrea Aime-4
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Benjamin Wright ha scritto:
> I'm having trouble using a CRS I'm getting from an ESRI ArcGIS 9.3 server. > (MapServer Service) > > The error I get is: > > Caused by: org.opengis.referencing.operation.OperationNotFoundException: > Bursa wolf parameters required. > at > org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:1072) > at > org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:1136) > at > org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:881) > at > org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep(DefaultCoordinateOperationFactory.java:998) > at > org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperation(DefaultCoordinateOperationFactory.java:267) > at > org.geotools.referencing.operation.BufferedCoordinateOperationFactory.createOperation(BufferedCoordinateOperationFactory.java:254) > at org.geotools.referencing.CRS.findMathTransform(CRS.java:1001) > at org.geotools.referencing.CRS.findMathTransform(CRS.java:969) > > The call made into this is: > CRS.findMathTransform(CRS_IN_QUESTION,DefaultGeographicCRS.WGS84); Just use CRS.findMathTransform(CRS_IN_QUESTION,DefaultGeographicCRS.WGS84, true); instead > I get the CRS from the WKT: > PROJCS["USA_Contiguous_Albers_Equal_Area_Conic",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-96.0],PARAMETER["Standard_Parallel_1",29.5],PARAMETER["Standard_Parallel_2",45.5],PARAMETER["Latitude_Of_Origin",37.5],UNIT["Meter",1.0],AUTHORITY["ESRI","102003"]] > > Spatial Reference: > http://spatialreference.org/ref/esri/102003/ > > I'm using Geotools version 2.5.2 > > What are 'Bursa wolf parameters'? Do I need them? The Bursa Wolf parameter are required to get decent precision (4m usually) in datum shifts, without them you might get a transformation error around 100m easily. In the case of NAD83 -> WGS84 the error should not be so big without them, but I've never actually measured it Cheers Andrea -- Andrea Aime OpenGeo - http://opengeo.org Expert service straight from the developers. --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email |
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Re: Trouble using CRS from ESRI ArcGIS 9.3 (esri:102003)
by Benjamin Wright
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Thanks Andrea, that fixed the problem.
I see what you mean with the inaccurate transformations though. With this particular transformation we don't see a significant problem, but with another one that was not working we're seeing latitude shifted by several kilometers (in the Eastern US / New England Area). Could be a problem with what we're doing or with the transformation - we'll have to look into it further. -Ben Wright
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